// Copyright 2021 Matrix Origin
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package tree

type Explain interface {
	Statement
}

type explainImpl struct {
	Explain
	Statement Statement
	Format string
}

//EXPLAIN stmt statement
type ExplainStmt struct {
	explainImpl
}

func NewExplainStmt(stmt Statement,f string)*ExplainStmt{
	return &ExplainStmt{ explainImpl{Statement: stmt,Format: f}}
}

//EXPLAIN ANALYZE statement
type ExplainAnalyze struct {
	explainImpl
}

func NewExplainAnalyze(stmt Statement, f string) *ExplainAnalyze {
	return &ExplainAnalyze{explainImpl{Statement: stmt,Format: f}}
}

//EXPLAIN FOR CONNECTION statement
type ExplainFor struct {
	explainImpl
	ID uint64
}

func NewExplainFor(f string,id uint64)*ExplainFor{
	return &ExplainFor{
		explainImpl: explainImpl{Statement: nil,Format: f},
		ID:          id,
	}
}